An earthquake measuring 4.1 on the Richter scale shook the Bulgarian towns of Shabla and Kavarna shortly before midnight on October 11 2011.

In both places, people fled from their homes into the streets. However, no damage was reported.

Shabla mayor Krassimir Krustev was quoted by bTV as saying that people had been frightened by the tremor, because of their memories of a powerful quake in the town in 2009.

Kavarna mayor Tsonko Tsonev said that people who ran out on to the streets included those who had hurried down from the higher floors of buildings. He confirmed that there had been no damage or injuries.

The Bulgarian Academy of Science said that the epicentre had been near Shabla.